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ACTIVITY 2: True or False Read the statements given below. Write T if the statement is true. And if the statement is false, rewrite the statement to make it true. 1. Radiant energy spreads out from its source in all directions. _________________________________________________________________________________________ 2. Electromagnetic radiation includes only visible light waves. __________________________________________________________________________________________ 3. Microwaves are a type of infrared wave. __________________________________________________________________________________________ 4. X rays have more energy than gamma rays. __________________________________________________________________________________________ 5. Radio waves, microwaves and ultraviolet waves all have longer wavelengths than visible light. __________________________________________________________________________________________ 6. Both X rays and gamma rays have higher frequencies than ultraviolet rays. __________________________________________________________________________________________ 7. The Sun radiates both visible energy and invisible energy. __________________________________________________________________________________________ 8. Communicating with satellites is an application of gamma rays. __________________________________________________________________________________________ 9. Hard X-rays comprise the range of the EM spectrum between UV and gamma rays. __________________________________________________________________________________________ 10. X-rays were discovered in 1895 by James Clerk Maxwell. __________________________________________________________________________________________ 11. FM radio broadcasting stands for frequency modulation. __________________________________________________________________________________________ 12. The EM spectrum is generally divided into seven regions, in order of increasing wavelength and decreasing energy and frequency. __________________________________________________________________________________________ 13. Ultraviolet light lies in EM spectrum between visible light and X-rays. __________________________________________________________________________________________ 14. Radio waves have a range of applications, including communications and radar.
15. Electric and magnetic field vectors are perpendicular to each other and at the same time are perpendicular to the direction of propagation of the wave. __________________________________________________________________________________________
Sagot :
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